Bilstein B6, thinking about running them on stock springs... what do you think?

[Mach VII]

Hi all, I am considering buying a set of Bilsteins and was wondering what advantage there is to lowering springs other than looks. I will not be racing and am looking for a more controlled feel than I have stock. 2019 GT non-PP on 19x10 wheels and 285/35/19 Conti ECS's. I have added the front bracing from the PP cars (STB, lower brace, upper brace) Thanks in advance!

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[Zelek]

The spring rates don't match up with the B6's. You need something stiffer. I went with the BMR handling springs on my B6's and they are amazing. That setup will do exactly what you're looking for.

The ride stiffens up a bit but you'll notice you don't get much roll into any corners. The car is more planted and you can take corners more aggressively. By no means is this uncomfortable on the street at all. I absolutely love this setup.

 

[Mach VII]

The spring rates don't match up with the B6's. You need something stiffer. I went with the BMR handling springs on my B6's and they are amazing. That setup will do exactly what you're looking for.

The ride stiffens up a bit but you'll notice you don't get much roll into any corners. The car is more planted and you can take corners more aggressively. By no means is this uncomfortable on the street at all. I absolutely love this setup.

Thanks for the reply. If I were to go to lowering springs I believe either BMR or Steeda minimum drop were the ones I was considering... more towards the Steeda.

 

[Brian@BMVK]

While they'll be a bit better match with something like Eibach Pro Kit, or better yet BMR Handling/GT350R springs, they won't be bad with GT PP springs either. They'll be a smidge overdamped.

 

[K4fxd]

I had them on stock springs. They match up well.

 

[Roadway 5.0]

Bilsteins were designed for stock spring rates—you’ll be good. If you decide to lower, both minimum drop springs you mentioned are a good pairing.

 

[K4fxd]

Bilsteins were designed for stock spring rates

This.

 

[Järn]

@Mach VII John, you asked: " what advantage there is to lowering springs other than looks?"
Simple answer: Ride Frequency.

Model	Front Spring	Rear Spring	Average Ride Frequency
Non-PP	160	668	1.36
PP1	165	728	1.40
PP2	198	822	1.51
GT350 (2016-18)	194	914	1.53
GT350 (2019+)	211	857	1.53
GT350R	240	914	1.63

A few more details on spring rates and ride frequency here
A very detailed discussion of ride frequency here:

The Steeda Minimum Drop Springs at 200/800 will give a ride frequency very close to the PP2 when matched with the appropriate dampers (both compression and rebound rates).

Note: I am not a mechanical engineer, and there is much more than spring rate and dampers to the performance/ride of the PP2 (ie wheels/tires...)

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